Inline form textarea using jQuery adapter

[Piotr Jasiun]

It should be possible to replace textarea with inline editor using jQuery adapter.

Now jQuery adapter check what is the type of element and if it is textarea it use replace otherwise it use inline so it is not possible do use inline on textartea.

In my opinion the best solution is to create additional configuration option with will be parsed by the adapter i.e.:

$( 'textarea' ).ckeditor( {
   creator: inline
} );

should create editor using inline function.

[Jakub Ś]

This is somewhat like a continuation of #10280.